5results about How to "Avoid excessive impact" patented technology

The utility model discloses a railway bridge culvert self -compacting concrete distribution device, by distribution support frame, moving mechanism and distribution system three parts are formed, longitudinal distribution movable frame can move along the support frame longitudinal, transverse distribution movable frame can move on vertical frame transversely, realized the all -round accurate positioning of distribution box in construction area, and the inside of distribution box is equipped with a plurality of independent storage bin, and each bin corresponds to a discharge gate, and is equipped with adjustable opening angle's discharge board, controls the down feeder speed through special blanking component, has solved the difficult problem that self -compacting concrete is easy to separate in long -distance delivery, through multipoint distribution and controllable down feeder speed, ensure that concrete even pours, and the whole set of device is flexible, and easy operation, can accurate positioning distribution point, can also accurate control down feeder speed, especially suitable for railway bridge culvert and other higher engineering application of concrete quality requirement, improves work efficiency while guaranteeing construction quality.

The invention relates to the technical field of mine excavation equipment, in particular to an impact-pressure-resistant self-protection supporting jack which comprises a hydraulic cylinder body, an air pressure buffering module, an ejector rod, a pressure relief module and a ventilation module. The air pressure buffering module is arranged at a bottom port of a telescopic cylinder of the hydraulic cylinder body and located in an inner cavity of an inner cylinder of the hydraulic cylinder body. The ejector rod is inserted into a top port of the telescopic cylinder, the ejector rod is in threaded connection with the telescopic cylinder, and the top end of the ejector rod is detachably assembled with a hinged support of an external hydraulic support and used for supporting the hydraulic support; the pressure relief module is arranged on the ejector rod and is connected with the air pressure buffer module; the ventilation module is arranged on the ejector rod and connected with the air pressure buffering module through a center flow channel of the ejector rod. The pressure relief module is arranged, so that internal air pressure can be relieved when the device is overloaded under stress, internal parts are prevented from being damaged, the maintenance cost of the device is reduced, and the defects existing in the prior art are overcome.

The utility model discloses a semi-feeding type rice thresher, and relates to the technical field of agricultural machinery. The semi-feeding type rice threshing machine comprises a machine body, a threshing cylinder and a feeding plate, the feeding plate is assembled on the upper portion of the machine body, a material guiding plate is assembled on the lower portion of the machine body, the threshing cylinder is installed between the feeding plate and the material guiding plate and is designed in a left-right sectional mode, the left section is a primary threshing cylinder, V-shaped arch teeth are distributed on the surface of the primary threshing cylinder, and the right section is a secondary threshing cylinder. And the right section is a secondary threshing cylinder. In order to overcome the defect that threshing is not thorough due to the fact that a threshing machine mostly adopts a single arch tooth structure for threshing, through the design of a left sectional type threshing roller and a right sectional type threshing roller, the V-shaped arch teeth on the left side can be rapidly inserted into the connecting position of rice and rice straw through sharp cutting edges, primary efficient threshing is achieved, residual grains are loosely connected with rice ears after primary threshing, and the threshing effect is good. The U-shaped arch teeth can be attached to rice ears, residual rice is gently and accurately stripped, excessive impact on grains is avoided, threshing cleanliness is improved, grain waste is reduced, and meanwhile straw treatment cost is reduced.

The utility model discloses an automobile oil pump body stamping trimming die which comprises a base, the top of the base is connected with the same placing plate through two symmetrically-arranged supporting plates, the placing plate is connected with a top plate through a plurality of sets of hydraulic rods, two die holders are arranged on the top of the placing plate, and a pump body to be machined is placed on the die holders. The die holder is connected with an auxiliary abutting mechanism, multiple sets of cutters are fixedly connected to the bottom of the top plate, the auxiliary abutting mechanism comprises fixing seats fixedly connected to the outer side wall of the die holder, air cylinders are fixedly connected to the tops of the two fixing seats, push rods are fixedly connected to the output ends of the two air cylinders, and abutting plates are fixedly installed at the ends of the push rods. By means of the die holder precisely matched with the size of the pump body and the auxiliary abutting mechanism, high-precision positioning of the pump body can be achieved, position deviation is effectively avoided, and therefore the trimming precision is guaranteed, the quality and the qualified rate of products are greatly improved, the defective rate is reduced, and reliable quality guarantee is provided for production of automobile oil pumps.

This utility model discloses a double-sided cable trench trolley, belonging to the technical field of cable trench trolleys. This double-sided cable trench trolley includes a main body, a moving mechanism, and a steering mechanism. The main body includes a cable trench trolley body, with a pair of movable slots at both ends. A sliding sleeve is installed at the bottom of each movable slot, and a moving block is slidably installed inside each sliding sleeve. The steering mechanism includes four steering boxes, the upper ends of which are rotatably fitted onto the bottom ends of the moving blocks. A steering wheel is rotatably connected to the bottom end of each steering box. The moving mechanism includes a pair of moving boxes, respectively located on both sides of the bottom end of the cable trench trolley body. Several driven wheels are rotatably connected to one side of the moving box, and a drive wheel is rotatably connected to the other side. This utility model effectively improves the practicality of the double-sided cable trench trolley and has high practical value.